Here is the full list of all 20 Tiny Tales: Heart of the Forest achievements.
Collect all Collectible Dolls.
Finish all the Minigames without skipping them.
Save Brie.
Rescue the Princess.
Fix the machine.
Defeat the cat in combat.
Complete a Hidden Object Puzzle without a mistake.
Complete a Hidden Object Puzzle in less than a minute.
Find 3 Hidden Objects within 3 seconds.
Finish 3 Hidden Object Puzzles in less than 10 minutes.
Finish 3 Hidden Object Puzzles without a Hint.
Finish the Tournament.
Complete 5 Minigames without skipping them.
Obtain a pass for the tournament.
Win in a duel.
Make your first spell.
Complete a Hidden Object Puzzle without a Hint.
Complete a Minigame in less than a minute.
Find one Collectible.
Find all Collectibles.